论文标题
30年后的质子旋转：我们知道什么，我们不知道什么？
Proton spin after 30 years: what we know and what we don't?
论文作者
论文摘要
自从欧洲MUON合作发表了质子旋转结构的第一个令人惊讶的结果以来，已经过去了三十多年。在理解质子自旋的起源时，已经取得了许多理论和实验进步。在这篇评论中，我们将讨论到目前为止所学到的知识，仍然缺少的内容，以及我们希望从即将进行的实验中学到的东西，包括JLAB 12 GEV和Electron-Ion Collider。特别是，我们专注于第一原理计算和总Gluon螺旋性$ΔG$以及Quark和Gluon Orbital Angular Momena的实验测量。
More than three decades has passed since the European Muon Collaboration published the first surprising result on the spin structure of the proton. Much theoretical and experimental progress has been made in understanding the origins of the proton spin. In this review, we will discuss what we have learned so far, what are still missing, and what we shall expect to learn from the upcoming experiments including JLab 12 GeV and Electron-Ion Collider. In particular, we focus on first principles calculations and experimental measurements of the total gluon helicity $ΔG$, and quark and gluon orbital angular momenta.
